I have two accounts that I wish to migrate from an old cpanel server to a new cpanel server over the weekend.
Each of the accounts has a domain and those domains are not managed by me, they belong to two clients.
These domains are pointing to my old server (ns1.mydomain.tld and ns2.mydomain.tld).
If I migrate the accounts from this old server to a new server, am I able to setup dns records in the old server so that if requests come to the old server they redirect clients to the new server?
I want to be able to migrate the accounts without having to be synchronized with the clients for changing their DNS records. After the accounts are migrated to the new cpanel account, I would notify them to change the DNS records to ns3.mydomain.tld and ns4.mydomain.tld.
Is this feasible and am I looking at this the right way, or should I approach this problem differently?
Would this pose problems for email deliverability and site access for those domains?
EDIT: Should I do this the other way around? Should I ask my clients to first change the DNS records of their domains, and until the accounts are migrated to the new server, have the new server redirect requests for those domains to the old server?